Evaluation of weed seed bank in pasture in the municipality of lagoa do ouro - pe, Brazil
International Journal of Development Research
Evaluation of weed seed bank in pasture in the municipality of lagoa do ouro - pe, Brazil
Received 17th June, 2019; Received in revised form 06th July, 2019; Accepted 12th August, 2019; Published online 30th September, 2019
Copyright © 2019, Cleide Mara Fonseca Paracampos et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The objective of this work was to evaluate the weed seed bank in pasture area. The experiment was carried out at the Federal University of Alagoas, in 2018, with soil from Lagoa do Ouro, Pe. For seed bank evaluation, 20 soil samples were collected in pasture area. For seed bank determination, seedlings emerged from the trays, whose identification and counting were determined at 15, 30, 45, 60, 75 and 90 days after the implementation of the experiment. The phytosociological indices analyzed were: the frequency with which species were germinating (F); plant density (D); abundance (A); relative frequency (FR); relative density (DR); relative abundance (AR); value of importance index (IVI); Relative importance value index (IVIR). Fourteen weed species with a density of 303 plants m-2 were verified, being Mollugoverticullata, the species with the highest density and importance value index, with 45.4 plants m-2 and 47.6%, respectively. The species with the highest frequencies were Acanthospermumhispidium DC, Portulacaoleraceae, Turneraulmifolia L. with 0.80% respectively for both.
